Kenwood GX-204KE, Service Manual

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11
GX204KEF2/KHF2/LEF2
GX204REF2/SEF2
●
PANEL (HEATER CONTROL) MICROCOMPUTER: MB89537A1010E (X34-405: IC1)
Pin No. Pin Name I/O Application Processing Operation Description
1 SH_DATA_H O HTR-C
µ
-com
→
System
µ
-com data output Communication speed: 4800bps
2 SH_DATA_S I System
µ
-com
→
HTR-C
µ
-com data output Communication speed: 4800bps
3 MOD2 I
Memory access mode setting input terminal
Always L input
for when FLASH
4 TYPE1 I Destination setting
4V or higher: Left-hand steering,
2V or lower: Right-hand steering
5 TYPE2 I Destination setting 4V or higher: SINGLE, 2V or lower: DUAL
6 TYPE3 I Destination setting 4V or higher: 15~29
°
C, 2V or lower: 18~32
°
C
7~11 NC O Not used Output L fixed
12 AVCC - A/D converter power supply terminal
13 AVR - A/D converter standard voltage input terminal
14 AVSS - A/D converter power supply terminal
15 NC I Not used Input fixed
16 ACC_DET I ACC detection L: ACC ON, H: ACC OFF, Detected voltage: 8.9V
17~19 NC I Not used Input fixed
20 RST - Reset input terminal L: Reset
21 MD0 - Input terminal for memory access mode setting H: When writing FLASH
µ
-com, L: Other
22 MD1 - Input terminal for memory access mode setting H: When writing FLASH
µ
-com, L: Other
23 X0 - Oscillator connection terminal 12.288MHz
24 X1 - Oscillator connection terminal 12.288MHz
25 VSS - Power supply terminal
26,27 NC O Not used Output L fixed
Start operating when the heater control
µ
-com IGN
28 HTR O Terminal for determining bright terminal valid/invalid ON, and at the point when the air-conditioner data is
finalized at UART, ON. H: ON, L: OFF
29 BRIGHT O Output terminal for bright information from vehicle
At the point when the bright data is finalized at
UART, ON. H: ON, L: OFF
30 FLASH_MOD I Input terminal for FLASH writing setting Always L input
31 R-DEF O Rear DEF indicator control terminal
LED luminance control by PWM control,
2 steps brightness, 4ms cycle PWM
31 P22 I Input terminal for FLASH writing setting H: When writing FLASH
µ
-com
32 F-DEF O Front DEF indicator control terminal
LED luminance control by PWM control,
2 steps brightness, 4ms cycle PWM
33 KEY_DET O Panel key operation check
When key or encoder is input, “H” is output at 100ms
(in test mode only)
34 ENC_L3 I Rotary encoder (left) pulse count input terminal
35 ENC_L2 I Rotary encoder (left) pulse count input terminal
36 ENC_L1 I Rotary encoder (left) pulse count input terminal
37 ENC_R3 I Rotary encoder (right) pulse count input terminal
MICROCOMPUTER’S TERMINAL DESCRIPTION
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